/*
*  Copyright 2019-2020 Zheng Jie
*
*  Licensed under the Apache License, Version 2.0 (the "License");
*  you may not use this file except in compliance with the License.
*  You may obtain a copy of the License at
*
*  http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing, software
*  distributed under the License is distributed on an "AS IS" BASIS,
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*  limitations under the License.
*/
package me.zhengjie.modules.student.service.impl;

import me.zhengjie.modules.student.domain.SysStudent;
import me.zhengjie.utils.ValidationUtil;
import me.zhengjie.utils.FileUtil;
import lombok.RequiredArgsConstructor;
import me.zhengjie.modules.student.repository.SysStudentRepository;
import me.zhengjie.modules.student.service.SysStudentService;
import me.zhengjie.modules.student.service.dto.SysStudentDto;
import me.zhengjie.modules.student.service.dto.SysStudentQueryCriteria;
import me.zhengjie.modules.student.service.mapstruct.SysStudentMapper;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import me.zhengjie.utils.PageUtil;
import me.zhengjie.utils.QueryHelp;
import java.util.List;
import java.util.Map;
import java.io.IOException;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.LinkedHashMap;

/**
* @website https://docs.auauz.net
* @description /
* @author addyming
* @date 2020-05-11
**/
@Service
@RequiredArgsConstructor
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true, rollbackFor = Exception.class)
public class SysStudentServiceImpl implements SysStudentService {

    private final SysStudentRepository sysStudentRepository;
    private final SysStudentMapper sysStudentMapper;

    @Override
    public Map<String,Object> queryAll(SysStudentQueryCriteria criteria, Pageable pageable){
        Page<SysStudent> page = sysStudentRepository.findAll((root, criteriaQuery, criteriaBuilder) -> QueryHelp.getPredicate(root,criteria,criteriaBuilder),pageable);
        return PageUtil.toPage(page.map(sysStudentMapper::toDto));
    }

    @Override
    public List<SysStudentDto> queryAll(SysStudentQueryCriteria criteria){
        return sysStudentMapper.toDto(sysStudentRepository.findAll((root, criteriaQuery, criteriaBuilder) -> QueryHelp.getPredicate(root,criteria,criteriaBuilder)));
    }

    @Override
    public SysStudentDto findById(Integer id) {
        SysStudent sysStudent = sysStudentRepository.findById(id).orElseGet(SysStudent::new);
        ValidationUtil.isNull(sysStudent.getId(),"SysStudent","id",id);
        return sysStudentMapper.toDto(sysStudent);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public SysStudentDto create(SysStudent resources) {
        return sysStudentMapper.toDto(sysStudentRepository.save(resources));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void update(SysStudent resources) {
        SysStudent sysStudent = sysStudentRepository.findById(resources.getId()).orElseGet(SysStudent::new);
        ValidationUtil.isNull( sysStudent.getId(),"SysStudent","id",resources.getId());
        sysStudent.copy(resources);
        sysStudentRepository.save(sysStudent);
    }

    @Override
    public void deleteAll(Integer[] ids) {
        for (Integer id : ids) {
            sysStudentRepository.deleteById(id);
        }
    }

    @Override
    public void download(List<SysStudentDto> all, HttpServletResponse response) throws IOException {
        List<Map<String, Object>> list = new ArrayList<>();
        for (SysStudentDto sysStudent : all) {
            Map<String,Object> map = new LinkedHashMap<>();
            map.put("学号", sysStudent.getStuNo());
            map.put("姓名", sysStudent.getStuName());
            map.put("班级", sysStudent.getStuClass());
            list.add(map);
        }
        FileUtil.downloadExcel(list, response);
    }
}